I have had a few guns with peeps...my 742 as a kid, a couple 7600's, a 94 lever. I don't think I've ever looked through any of them with the aperture in the sight. There is a transition in the focus of your eye when you put the gun up...first you find the peep, then the bead, then the animal, then the sight kinda disappear. Happens in a second or so, but there is definitely a transition. Less so with scopes, even less so with dots. IMO